ok am sure this has been asked a million times but im quite rubbish at searching for old threads. please feel free to link if it is easier.
on the basis that i have always had a very regular cycle is it possible to calculate the best dates to conceive as far ahead as Feb 09? Only that we've decided to try for DC2 from about then and we're also planning a holiday! just wondered (a) is possible and (b) how demanding the maths is!
thanks in advance.